Turbine interstage sealing structure of gas turbine

Abstract

The utility model provides a gas turbine interstage sealing structure, belongs to the field of sealing equipment, aims to solve the problem that a connecting pipeline is inconvenient to disassemble and assemble, and comprises a sealing box, a connecting pipe is fixedly connected to the sealing box, a partition plate is fixedly connected to a connecting shaft, a first sealing gasket is fixedly connected to the partition plate, and a second sealing gasket is fixedly connected to the first sealing gasket. A clamping plate is fixedly connected to the moving block, and a second guide block is fixedly connected to the clamping plate. The device is provided with a mounting plate; when a spliced and attached flange plate needs to be disassembled, a rotating disc can be rotated to drive a bidirectional threaded rod to operate, the bidirectional threaded rod can drive moving blocks on the two sides to move outwards when rotating, the moving blocks can drive clamping plates and positioning blocks to be separated from the flange plate when moving, and the clamping plates can stably move under the guidance of second guide blocks when moving; and the moving stability is improved, the flange plate on the connecting pipe can be detached after being not hindered, equipment is overhauled and maintained, and the detaching efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of sealing equipment, and more specifically, to a gas turbine turbine inter-stage sealing structure. Background Technique

[0002] There are usually several different designs for the turbine inter-stage seal of a gas turbine, such as labyrinth seal, blade seal, gas seal, elastic seal, etc. Selecting different sealing methods can achieve different effects. The working temperature of the rotor disc of a gas turbine is relatively high. If its temperature is not controlled, its too high temperature will cause a decrease in strength, and an external pipeline is required for wind transportation to play a cooling role. The sealing structure can effectively prevent gas from leaking from the pipeline, thereby improving the heat dissipation effect of the rotor disc of the gas turbine.

[0003] However, most of the existing gas turbine turbine inter-stage sealing structures have the following problems:

[0004] For example, for the bellows gas sealing device with the publication number CN220540319U, although it can achieve the effect of sealing and preventing gas leakage through the isolation of the valve core, it can only perform isolation sealing. When transporting wind, the wind speed is in a fixed state, and it is impossible to reduce the transport speed to control the heat dissipation effect, and it is inconvenient to adjust according to the usage situation; at the same time, when using pipelines for transportation, the splicing between pipelines is mostly connected and fixed by flanges in cooperation with multiple bolts. After long-term use, when the equipment needs to be disassembled or overhauled, multiple bolts on the flange need to be disassembled and removed. Rotating and disassembling multiple bolts is time-consuming and affects the overhaul and maintenance efficiency, and it is inconvenient to disassemble and install the connecting pipelines conveniently.

[0005] Therefore, we make improvements and propose a gas turbine turbine inter-stage sealing structure. Content of the Utility Model

[0006] The purpose of the utility model is to address the problems of inconvenience in adjusting according to the usage situation and inconvenience in conveniently disassembling and installing the connecting pipelines currently.

[0007] To achieve the above purpose, the utility model provides the following technical solutions:

[0008] A gas turbine turbine inter-stage sealing structure to improve the above problems.

[0009] Specifically, this application is as follows:

[0010] It includes a sealed box, a connecting pipe is fixedly connected to the sealed box, a connecting shaft is connected to the sealed box through a sealed bearing, a partition plate is fixedly connected to the connecting shaft, a first sealing gasket is fixedly connected to the partition plate, a connecting frame is fixedly connected to the connecting shaft, a first guiding block is fixedly connected to the connecting frame, the first guiding block is connected to the inside of the sealed box in a limiting and sliding manner, a spring is fixedly connected to the connecting frame, the other end of the spring is fixedly connected to a fixing plate, a clamping block is fixedly connected to the fixing plate, a clamping groove is formed in the sealed box, a connecting rod is fixedly connected to the fixing plate, a fixing disk is fixedly connected to the connecting rod, a flange plate is fixedly connected to the connecting pipe, a second sealing gasket is fixedly connected to the flange plate, an installation plate is arranged on one side of the flange plate, a bidirectional threaded rod is rotatably connected to the installation plate, a rotating disk is fixedly connected to the bidirectional threaded rod, a moving block is threadedly connected to the bidirectional threaded rod, a clamping plate is fixedly connected to the moving block, and a second guiding block is fixedly connected to the clamping plate.

[0011] As a preferred technical solution of the present application, the connecting shaft is fixedly connected to the central part of the partition plate, and the side end face of the first sealing gasket is attached to the inner side face of the sealed box.

[0012] As a preferred technical solution of the present application, the springs are distributed at equal angles on the fixing plate, and the springs correspond to the connecting rods one by one.

[0013] As a preferred technical solution of the present application, the clamping grooves are distributed at equal angles on the sealed box, and the side end face of the moving block is attached to the inner side face of the installation plate.

[0014] As a preferred technical solution of the present application, the moving blocks are symmetrically distributed on the left and right sides of the bidirectional threaded rod, and the moving blocks correspond to the clamping plates one by one.

[0015] As a preferred technical solution of the present application, the second guiding block is connected to the inside of the installation plate in a limiting and sliding manner, a positioning block is fixedly connected to the clamping plate, and the cross sections of the first guiding block and the second guiding block are in a "T" shape.

[0016] Compared with the prior art, the beneficial effects of the present utility model are:

[0017] In the solution of the present application:

[0018] 1. There is a connecting frame; when adjusting the isolation angle of the partition board, the fixed disk can be pulled to drive the fixed plate to move through the connecting rod. When the fixed plate moves, it can squeeze the spring, and at the same time, the clamping block on the fixed plate can disengage from the card slot. After being unobstructed, the connecting frame can be rotated to drive the connecting shaft to rotate, and the connecting shaft can drive the partition board to rotate to adjust the use angle of the partition board, adjust the flow gap in the sealed box, facilitate controlling the subsequent air conveying speed, and when performing subsequent sealing protection, the partition board can be rotated flat and sealed with the first gasket on the partition board to avoid air leakage. After the adjustment is completed, release the fixed disk, and under the push of the spring, drive the fixed plate and the clamping block to reset. The clamping block can be engaged in the card slot for limit fixation to avoid air leakage due to rotation.

[0019] 2. There is a mounting plate; when it is necessary to disassemble the spliced and fitted flange, the rotating disk can be rotated to drive the bidirectional threaded rod to operate. When the bidirectional threaded rod rotates, it can drive the moving blocks on both sides to move outwards. When the moving blocks move, they can drive the clamping plate and the positioning block to disengage from the flange. When the clamping plate moves, it can move smoothly under the guidance of the second guiding block to improve the moving stability. After being unobstructed, the flange on the connecting pipe can be disassembled to repair and maintain the equipment and improve the disassembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an overall three-dimensional structure schematic diagram of the inter-stage seal structure of the gas turbine provided by this application;

[0021] Figure 2 It is a side view structure schematic diagram of the partition board of the inter-stage seal structure of the gas turbine provided by this application;

[0022] Figure 3 It is a top view structure schematic diagram of the connecting shaft of the inter-stage seal structure of the gas turbine provided by this application;

[0023] Figure 4 It is the Figure 2 enlarged structure schematic diagram at A of the inter-stage seal structure of the gas turbine provided by this application;

[0024] Figure 5 It is the Figure 2 enlarged structure schematic diagram at B of the inter-stage seal structure of the gas turbine provided by this application;

[0025] Figure 6 It is a side view structure schematic diagram of the mounting plate of the inter-stage seal structure of the gas turbine provided by this application.

[0026] Labels in the figure: 1. Sealed box; 2. Connecting pipe; 3. Connecting shaft; 4. Partition board; 5. First gasket; 6. Connecting frame; 7. First guiding block; 8. Spring; 9. Fixed plate; 10. Clamping block; 11. Card slot; 12. Connecting rod; 13. Fixed disk; 14. Flange; 15. Second gasket; 16. Mounting plate; 17. Rotating disk; 18. Bidirectional threaded rod; 19. Moving block; 20. Clamping plate; 21. Second guiding block; 22. Positioning block. Detailed implementation mode

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some but not all of the embodiments of the present utility model.

[0028] Therefore, the following detailed description of the embodiments of the present utility model is not intended to limit the scope of the present utility model claimed, but merely represents some embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0029] It should be noted that, without conflict, the embodiments in the present utility model and the features and technical solutions in the embodiments may be combined with each other.

[0030] It should be noted that similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0031] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product is normally placed, or the orientation or positional relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0032] Embodiment 1:

[0033] As Figures 1-6As shown in the figure, this embodiment proposes a gas turbine inter-stage seal structure, including a seal box 1, a connecting pipe 2 fixedly connected to the seal box 1, a connecting shaft 3 sealingly bearing-connected to the seal box 1, a partition plate 4 fixedly connected to the connecting shaft 3, a first gasket 5 fixedly connected to the partition plate 4, a connecting frame 6 fixedly connected to the connecting shaft 3, a first guiding block 7 fixedly connected to the connecting frame 6, the first guiding block 7 being limited and slidably connected within the seal box 1, a spring 8 fixedly connected within the connecting frame 6, the other end of the spring 8 being fixedly connected to a fixing plate 9, a clamping block 10 fixedly connected to the fixing plate 9, a clamping groove 11 formed within the seal box 1, a connecting rod 12 fixedly connected to the fixing plate 9, a fixing disk 13 fixedly connected to the connecting rod 12, a flange 14 fixedly connected to the connecting pipe 2, a second gasket 15 fixedly connected to the flange 14, an installation plate 16 provided on one side of the flange 14, a bidirectional threaded rod 18 rotatably connected to the installation plate 16, a rotating disk 17 fixedly connected to the bidirectional threaded rod 18, a moving block 19 threadedly connected to the bidirectional threaded rod 18, a clamping plate 20 fixedly connected to the moving block 19, and a second guiding block 21 fixedly connected to the clamping plate 20.

[0034] Example 2:

[0035] The solution in Example 1 will be further introduced below in combination with the specific working mode. See the following description for details:

[0036] As Figure 2 shown, as a preferred embodiment, on the basis of the above method, further, the connecting shaft 3 is fixedly connected to the central part of the partition plate 4, and the side end face of the first gasket 5 is in contact with the inner side face of the seal box 1, which can ensure that when the connecting shaft 3 drives the partition plate 4 to rotate, the partition plate 4 can rotate smoothly, avoiding the situation where the isolation and guiding are affected.

[0037] As Figure 3 shown, as a preferred embodiment, on the basis of the above method, further, the springs 8 are distributed at equal angles on the fixing plate 9, and the springs 8 correspond to the connecting rods 12 one by one, which can ensure that the springs 8 distributed at equal angles can smoothly push the fixing plate 9 to move.

[0038] As Figure 5 shown, as a preferred embodiment, on the basis of the above method, further, the clamping grooves 11 are distributed at equal angles on the seal box 1, and the side end face of the moving block 19 is in contact with the inner side face of the installation plate 16, which can ensure that the moving block 19 can move smoothly through the fitting support of the inner side face of the installation plate 16 when moving.

[0039] As Figure 5As shown, as a preferred embodiment, on the basis of the above method, further, the moving blocks 19 are symmetrically distributed on the left and right sides of the bidirectional threaded rod 18, and the moving blocks 19 correspond to the clamping plates 20 one by one, which can ensure that the two clamping plates 20 can stably clamp and limit the two flange plates 14.

[0040] As Figure 6 shown, as a preferred embodiment, on the basis of the above method, further, the second guiding block 21 is connected to the mounting plate 16 in a limited sliding manner, and a positioning block 22 is fixedly connected to the clamping plate 20. The cross sections of the first guiding block 7 and the second guiding block 21 are in a "T" shape, which can ensure that the first guiding block 7 and the second guiding block 21 in a "T" shape can support the movement of the components.

[0041] Specifically, when the inter-stage sealing structure of this gas turbine is in use: Combining Figures 1-6 , when adjusting the isolation angle of the partition plate 4, the fixed disk 13 can be pulled to drive the fixed plate 9 to move through the connecting rod 12. When the fixed plate 9 moves, it can squeeze the spring 8. At the same time, the clamping block 10 on the fixed plate 9 can be disengaged from the clamping groove 11. After being unobstructed, the connecting frame 6 can be rotated to drive the connecting shaft 3 to rotate. When the connecting frame 6 rotates, it can rotate smoothly through the guiding of the first guiding block 7. The connecting shaft 3 can drive the partition plate 4 to rotate, adjust the use angle of the partition plate 4, and adjust the flow gap in the sealing box 1 to facilitate controlling the subsequent wind conveying speed. And when performing subsequent sealing protection, the partition plate 4 can be rotated flush, and the first sealing gasket 5 on the partition plate 4 can be used for sealing to avoid air leakage. After the adjustment is completed, the fixed disk 13 is released, and the fixed plate 9 and the clamping block 10 are driven to reset under the push of the spring 8. The clamping block 10 can be clamped in the clamping groove 11 for limit fixation to avoid air leakage caused by rotation.

[0042] When it is necessary to disassemble the spliced and fitted flange plates 14, the rotating disk 17 can be rotated to drive the bidirectional threaded rod 18 to operate. When the bidirectional threaded rod 18 rotates, it can drive the two moving blocks 19 to move outwards. When the moving blocks 19 move, they can drive the clamping plates 20 and the positioning blocks 22 to disengage from the flange plates 14. When the clamping plates 20 move, they can move smoothly under the guiding of the second guiding block 21 to improve the moving stability. After being unobstructed, the flange plates 14 on the connecting pipe 2 can be disassembled for equipment maintenance. When splicing and using subsequently, the bidirectional threaded rod 18 can be rotated in the reverse direction. The bidirectional threaded rod 18 can drive the two moving blocks 19 to move inwards. The two moving blocks 19 drive the clamping plates 20 to clamp and fix the flange plates 14, and the second sealing gasket 15 on the flange plates 14 can improve the sealing effect to avoid air leakage.

[0043] The above embodiments are only used to illustrate the present utility model and do not limit the technical solutions described by the present utility model. Although the present specification has described the present utility model in detail with reference to the above various embodiments, the present utility model is not limited to the above specific implementation manners. Therefore, any modification or equivalent replacement of the present utility model; and all technical solutions and their improvements that do not depart from the spirit and scope of the utility model are covered by the scope of the claims of the present utility model.

Claims

1. A gas turbine inter-stage seal structure, comprising a seal box (1), characterized in that A connecting pipe (2) is fixedly connected to the sealed box (1). A connecting shaft (3) is sealingly and bearing-connected to the sealed box (1). A partition plate (4) is fixedly connected to the connecting shaft (3). A first gasket (5) is fixedly connected to the partition plate (4). A connecting frame (6) is fixedly connected to the connecting shaft (3). A first guiding block (7) is fixedly connected to the connecting frame (6). The first guiding block (7) is connected to the inside of the sealed box (1) in a limiting and sliding manner. A spring (8) is fixedly connected inside the connecting frame (6). The other end of the spring (8) is fixedly connected to a fixing plate (9). A clamping block (10) is fixedly connected to the fixing plate (9). A clamping groove (11) is formed inside the sealed box (1). A connecting rod (12) is fixedly connected to the fixing plate (9). A fixing disc (13) is fixedly connected to the connecting rod (12). A flange plate (14) is fixedly connected to the connecting pipe (2). A second gasket (15) is fixedly connected to the flange plate (14). An installation plate (16) is arranged on one side of the flange plate (14). A bidirectional threaded rod (18) is rotatably connected to the installation plate (16). A rotating disc (17) is fixedly connected to the bidirectional threaded rod (18). A moving block (19) is threadedly connected to the bidirectional threaded rod (18). A clamping plate (20) is fixedly connected to the moving block (19). A second guiding block (21) is fixedly connected to the clamping plate (20).

2. The inter-stage sealing structure of a gas turbine turbine according to claim 1, characterized in that The connecting shaft (3) is fixedly connected to the central part of the partition plate (4). The side end face of the first gasket (5) is in fit with the inner side face of the sealed box (1).

3. A gas turbine inter-stage sealing structure according to claim 1, characterized in that, The springs (8) are distributed at equal angles on the fixing plate (9), and the springs (8) correspond to the connecting rods (12) one by one.

4. A gas turbine inter-stage seal structure according to claim 1, characterized in that, The clamping grooves (11) are distributed at equal angles on the sealed box (1). The side end face of the moving block (19) is in fit with the inner side face of the installation plate (16).

5. A gas turbine inter-stage sealing structure according to claim 1, characterized in that The moving blocks (19) are symmetrically distributed on the left and right sides of the bidirectional threaded rod (18), and the moving blocks (19) correspond to the clamping plates (20) one by one.

6. A gas turbine inter-stage seal structure according to claim 1, characterized in that, The second guiding block (21) is connected to the inside of the installation plate (16) in a limiting and sliding manner. A positioning block (22) is fixedly connected to the clamping plate (20). The cross sections of the first guiding block (7) and the second guiding block (21) are in a "T" shape.

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